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Vishay General Semiconductor - Diodes Division 1.5KA12AHE3/73
- Part No.:
- 1.5KA12AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA12AHE3/73.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:2,435
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Product details
Overview
1.5KA12AHE3/73 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode with 1500 W peak pulse power (10/1000 µs), 11.4–12.6 V breakdown voltage, and AEC-Q101 qualification. It clamps transients to ≤16.7 V at 89.8 A, operates from −65 °C to +185 °C, and protects MOSFETs and sensor signal lines in automotive powertrain control units.
For engineers reviewing the 1.5KA12AHE3/73 datasheet, 1.5KA12AHE3/73 pinout, 1.5KA12AHE3/73 application, or 1.5KA12AHE3/73 equivalent, key selection criteria include clamping voltage under 100 A surge, high-temperature junction stability up to 185 °C, RoHS-compliant matte tin leads, and JESD201 Class 2 whisker resistance for automotive PCB reliability.
Technical Context
This TVS diode uses patented PAR® construction for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching spikes in 12 V automotive systems. Its unidirectional polarity and 10.2 V stand-off voltage ensure compatibility with standard 12 V rail monitoring without false triggering.
The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits a temperature coefficient of 0.078 %/°C on VBR, supporting stable clamping across wide ambient ranges. Derating curves confirm usable power dissipation down to 75 °C lead temperature per Fig. 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump and ISO 7637-2 pulse 5a surges without failure |
| Breakdown Voltage VBR | 11.4–12.6 V at 1 mA - ensures reliable turn-on above nominal 12 V system voltage |
| Clamping Voltage VC | ≤16.7 V at 89.8 A - limits downstream IC stress below 18 V absolute maximum ratings |
| Stand-off Voltage VWM | 10.2 V - blocks normal 12 V rail noise while allowing margin for ripple and tolerance |
| Junction Temp Range | −65 °C to +185 °C - supports under-hood placement in engine control modules |
| Surge Current IPPM | 89.8 A - matches typical 12 V automotive transient current levels per ISO 16750-2 |
| Leakage Current ID | ≤2 µA at 10.2 V - minimizes standby power loss in always-on vehicle networks |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 rating, matte tin-plated axial leads (0.042" diameter), 0.375" lead length, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during reverse-biased clamping | Connected to protected line (e.g., sensor VCC); must be routed with low-inductance path to ground |
| Cathode | Current exit during clamping; marked by band | Connected to system ground plane; requires low-impedance return path to handle 89.8 A surge |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance for tighter clamping and lower VC vs. conventional TVS |
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| RoHS-compliant & JESD201 Class 2 | Ensures long-term solder joint integrity and whisker-free reliability in high-vibration environments |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems without derating |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Sensor Interface |
|---|---|
Use Scenario: Protects ECU main 12 V supply against alternator load dump and battery disconnect transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground, clamping within nanoseconds. Use Value: Limits voltage to ≤16.7 V during 89.8 A surges, preventing damage to MCU power regulators and CAN transceivers. | Use Scenario: Shields LVDS or analog video signal lines from ESD and cable discharge events in rear-view cameras. IC Role / Device Role / Timing Role: TVS connected across differential pair or single-ended signal-to-ground, with <1 ns response. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) to safe levels while maintaining <2 pF junction capacitance at 0 V bias. |
| Body Control Module (BCM) LIN Bus | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards LIN transceiver pins against inductive kickback from solenoid loads and board-level ESD. IC Role / Device Role / Timing Role: Low-leakage (≤2 µA) TVS placed at transceiver I/O, referenced to local ground. Use Value: Maintains LIN bus signal integrity with minimal DC loading while suppressing transients up to 1500 W. | Use Scenario: Protects gate drivers and high-side switches in EPS motor control H-bridges from flyback voltage spikes. IC Role / Device Role / Timing Role: TVS mounted directly at driver output pins, with short trace to ground plane. Use Value: Absorbs 200 A surge (8.3 ms) without degradation, preserving MOSFET gate oxide integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3/52 | 600 W rating, SMB package, 11.1–12.3 V VBR, 19.9 V VC at 30.1 A | Lower power handling; suited for non-load-dump consumer interfaces | Select when space-constrained layouts require SMT and surge energy is ≤600 W |
| 1.5KE12A | Through-hole DO-201 package, same 1500 W rating, but not AEC-Q101 qualified; 11.4–12.6 V VBR, 19.9 V VC | Lacks automotive qualification and high-temp reliability testing | Use only in industrial or commercial designs where AEC-Q101 is not mandated |
Compared with SMBJ12AHE3/52 and 1.5KE12A, the 1.5KA12AHE3/73 delivers superior automotive robustness via AEC-Q101 validation, tighter clamping (16.7 V vs. 19.9 V), and extended 185 °C junction capability-critical for engine bay deployment where thermal margins are constrained.
Availability
1.5KA12AHE3/73 is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS camera protection, body electronics, and electric power steering systems requiring stable component supply and full AEC-Q101 compliance.
Supply support for 1.5KA12AHE3/73 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for automotive transient suppression, emphasizing AEC-Q101 qualification, high-temperature operation, and robust PAR® clamping performance in harsh under-hood environments.
FAQ
What is the clamping voltage of the 1.5KA12AHE3/73 at its rated peak pulse current?
The 1.5KA12AHE3/73 has a maximum clamping voltage (VC) of 16.7 V at its rated peak pulse current of 89.8 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 16.7 V during worst-case transients, making it suitable for protecting 18 V-rated ICs in 12 V automotive systems.
Is the 1.5KA12AHE3/73 qualified for automotive applications?
Yes, the 1.5KA12AHE3/73 is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet (Doc #88300, Rev 20-Oct-08) under "Mechanical Data" and "Notes". It meets automotive reliability requirements including temperature cycling, humidity resistance, and mechanical shock testing-making it appropriate for engine control units, body modules, and ADAS sensors.
What does the HE3/73 suffix indicate for the 1.5KA12AHE3/73?
The HE3/73 suffix denotes RoHS-compliant, high-reliability construction: HE3 specifies matte tin-plated leads compliant with J-STD-002 and JESD22-B102, plus JESD201 Class 2 whisker resistance; /73 indicates packaging in 13" paper tape and reel with 750 units per reel, per Vishay's ordering information table.
How does the 1.5KA12AHE3/73 differ from the standard 1.5KA12A?
The 1.5KA12AHE3/73 is identical in electrical and thermal specifications to the 1.5KA12A but adds the HE3/73 packaging and qualification identifiers: RoHS compliance, AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and 13" tape-and-reel delivery. The base 1.5KA12A may lack these automotive-specific certifications and packaging formats.
What is the maximum operating temperature for the 1.5KA12AHE3/73 junction?
The 1.5KA12AHE3/73 has a maximum junction temperature (TJ) of +185 °C, as specified in the "Maximum Ratings" table of the Vishay datasheet. This enables reliable operation in under-hood automotive locations such as engine control units and transmission control modules where ambient temperatures exceed 125 °C.
1.5KA12AHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA12AHE3/73 FAQ
1.How can I place an order for 1.5KA12AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA12AHE3/73 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5KA12AHE3/73 reliable?
The price and inventory of 1.5KA12AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA12AHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA12AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA12AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA12AHE3/73?
1.5KA12AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA12AHE3/73 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5KA12AHE3/73?
For technical support, including 1.5KA12AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA12AHE3/73 requirements.
6.How does Aetrix verify that 1.5KA12AHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA12AHE3/73 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5KA12AHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA12AHE3/73?
All 1.5KA12AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA12AHE3/73, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5KA12AHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA12AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA12AHE3/73 Tags
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